The protection of KCsSb photocathodes with CsBr films

Authors :: Amos Breskin
A. Buzulutskov
M. Prager
E. Shefer
Rachel Chechik
Source :: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 400:173-176
Publication Year :: 1997
Publisher :: Elsevier BV, 1997.
Abstract: We report on photoemission properties of visible KCsSb reflective photocathodes coated with thin CsBr protective films. We present the absolute quantum efficiency and its stability under prolonged contact with oxygen. It is found that KCsSb photocathodes coated with 280 A thick CsBr films have 5% quantum efficiency at 312 nm and can withstand an exposure to 150 Torr of oxygen for half an hour. We discuss the possible role of good lattice constants matching between the photocathodes and the protecting film.

Subjects :: Physics
Nuclear and High Energy Physics
Lattice constant
Optics
chemistry
business.industry
Torr
Optoelectronics
chemistry.chemical_element
Quantum efficiency
business
Instrumentation
Oxygen

ISSN :: 01689002
Volume :: 400
Database :: OpenAIRE
Journal :: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Accession number :: edsair.doi...........7445250d2a9387674dd53b77c0218453

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